US6270114B2 - Method and arrangement for seat occupancy recognition in a motor vehicle - Google Patents

Method and arrangement for seat occupancy recognition in a motor vehicle Download PDF

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Publication number
US6270114B2
US6270114B2 US09/085,814 US8581498A US6270114B2 US 6270114 B2 US6270114 B2 US 6270114B2 US 8581498 A US8581498 A US 8581498A US 6270114 B2 US6270114 B2 US 6270114B2
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United States
Prior art keywords
vehicle
seat
sensor
seat occupancy
occupancy
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/085,814
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English (en)
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US20010001522A1 (en
Inventor
Rudolph Mai
Ruprecht Sinnhuber
André Zander
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Volkswagen AG
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Volkswagen AG
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Publication date
Application filed by Volkswagen AG filed Critical Volkswagen AG
Assigned to VOLKSWAGEN AG reassignment VOLKSWAGEN AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MAI, RUDOLF, SINNHUBER, RUPRECHT, ZANDER, ANDRE
Publication of US20010001522A1 publication Critical patent/US20010001522A1/en
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Publication of US6270114B2 publication Critical patent/US6270114B2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/0153—Passenger detection systems using field detection presence sensors
    • B60R21/01534—Passenger detection systems using field detection presence sensors using electromagneticwaves, e.g. infrared
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/0153—Passenger detection systems using field detection presence sensors
    • B60R21/01532—Passenger detection systems using field detection presence sensors using electric or capacitive field sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/0153—Passenger detection systems using field detection presence sensors
    • B60R21/0154—Passenger detection systems using field detection presence sensors in combination with seat heating

Definitions

  • This invention relates to methods and arrangements for seat occupancy recognition in motor vehicles.
  • German Patent No. 38 02 159 discloses a seat occupancy recognition arrangement for motor vehicles having adjustable seats in which occupancy of a vehicle seat is determined by a comparator which operates a switch, by displacement transducers detecting the position of the seat relative to the vehicle and the parts of seat relative to each other, and by a contact-free range finder measuring a distance from a seat surface or a part of a seat surface to a part of the vehicle on which a range finder is mounted.
  • the comparator calculates a distance from the surface of the vehicle seat to the range finder sensor from position data of the displacement transmitters, compares the distance with that determined by the range finder and, if the readings coincide, triggers the switch.
  • the range finder is preferably in the form of an ultrasonic or infrared sensor which transmits an ultrasonic or infrared signal toward the vehicle seat and receives a signal reflected from that direction by a surface of a person sitting on the seat or, if the seat is unoccupied, from the back rest of the seat, by which the seat occupancy condition may be inferred from the transit time of the signal.
  • U.S. Pat. No. 5,330,226 discloses a seat occupancy recognition arrangement in which an infrared sensor is mounted in the roof above the seat.
  • the infrared sensor has a plurality of fields of vision by which the position of an occupant relative to the airbag is determined so that the airbag, when released, can be suitably triggered without injuring the occupant.
  • German Offenlungsschrift No. 41 10 702 discloses a seat occupancy recognition arrangement for actuating a seat heater in which a seat heating conductor mounted in the seat surface and heatable by electric current forms the first electrode of a capacitive seat occupancy sensor consisting of two electrodes.
  • a disadvantage of all prior art occupant detecting arrangements is that the vehicle occupants are continuously exposed to sources of radiation. Since the effects of long-term exposure to electromagnetic radiation, or to ultrasonic waves, are much in dispute, there is a danger that the well-being of the occupants may be impaired, or even that they may be injured, by a continuous exposure to radiation.
  • Another object of the invention is to provide a method and arrangement for seat occupancy recognition in a motor vehicle in which the occupants arc subjected as little as possible to any kind of radiation.
  • a change in seat occupancy always requires a person getting in or a person getting out of a vehicle
  • most relevant situations involving a change of seat occupancy can be detected by a door condition sensor and/or an engine condition sensor. If the motor vehicle is started, the sensor must first check to determine which vehicle seats are occupied. For this purpose, various permutations are possible. Thus, the driver may get in and proceed to start the engine before all occupants are in the vehicle or the driver may wait to start the engine until after all occupants are seated. Since reliable seat occupancy recognition is possible only after the last action, preferably there should be an alternative scan by the detector in that condition.
  • a seat occupancy or occupant position recognition occurs only if a sensor for detecting an impending collision to trigger an airbag generates a signal, in which case the configuration of the sensor is such that it will detect a collision, or an impending collision, before any deceleration of the vehicle due to the collision affects the interior of the vehicle or its occupants.
  • the sensor for detecting an impending collision is a “pre-crash sensor.”
  • a pre-crash sensor consists of a plurality of individual sensors covering a neighborhood around the vehicle. If an object, or an obstacle, is detected in the neighborhood of the vehicle, the sensor detects the current distance of the object from the vehicle, and possibly the relative velocity between object and the vehicle, in order to signal an impending collision with the object.
  • an engine- and/or door-condition sensor detects whether a vehicle is occupied, and only the precise position of the vehicle seat and the sitting position of the occupant remain to be determined by a seat occupancy recognition arrangement which is actuated by the sensor for detecting a collision or impending collision.
  • a seat occupancy recognition arrangement I comprises a door-condition sensor 2 and an engine-condition sensor 3 , and logic level recognition devices 4 and 5 associated with each of the sensors 2 and 3 , respectively.
  • the signal output from the sensor 2 or 3 together with the signal output of the logic level recognition device 5 for 4 or the other sensor 3 or 2 , as the case may be, is supplied to the input of an AND gate 6 and 7 , respectively.
  • the signal outputs of the AND gates 6 and 7 are linked disjunctively by way of an OR gate 9 providing an output to a counter 10 .
  • the counter 10 is connected to a seat occupancy sensor 11 which, in turn, is operatively connected with an associated vehicle seat 12 and a seat heater 13 .
  • the recognition arrangement 1 further includes a pre-crash sensor 14 connectable either to the counter 10 or directly to the seat occupancy sensor 11 .
  • a motor vehicle operator enters his vehicle and waits until his passengers are seated and the vehicle door is closed.
  • the doors are closed, there is a logic level 1 at the output of the door condition sensor 2 .
  • the logic condition at the output of the engine condition sensor 3 changes from logic 0 to logic 1.
  • This positive logic level is detected by the logic level recognition device 5 , which then changes its output from logic level 0 to logic level 1.
  • both inputs of the AND gate 7 and at logic 1 and its output also switches to logic level 1, and consequently, the output of the OR gate 9 switches to logic level 1.
  • the logic level 1 of the OR gate 9 enables the counter 10 .
  • the counter 10 then starts counting and runs up to a certain count which is either hard-wired or freely programmable. As long as the counter 10 runs, the seat occupancy sensor 11 is activated and detects whether the vehicle seat 12 is occupied. If the seat occupancy sensor 11 detects an occupant, the corresponding seat heater 13 is switched on.
  • the seat occupancy sensor 11 may, for example, be an infrared, ultrasonic or capacitance sensor. When the counter 10 reaches its set count, it generates a reset signal 15 for the logic level recognition devices 4 and 5 to disable the sensors.
  • the pre-crash sensor 14 If a hazardous situation arises during vehicle operation that might call for release of the airbag, the pre-crash sensor 14 generates a signal that either enables the counter 10 or directly activates the seat occupancy sensor 11 . The latter then determines the exact position of the occupant in order to control the airbag in such a way that its release will not injure the occupant.
  • the seat heater 13 may be switched off either upon opening of the corresponding door or when the engine is shut off, or else by a negative result at the next seat occupancy recognition interval.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Air Bags (AREA)
US09/085,814 1997-05-27 1998-05-27 Method and arrangement for seat occupancy recognition in a motor vehicle Expired - Fee Related US6270114B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19722085 1997-05-27
DE19722085.1 1997-05-27
DE19722085A DE19722085A1 (de) 1997-05-27 1997-05-27 Verfahren und Vorrichtung zur Sitzbelegungserkennung in einem Kraftfahrzeug

Publications (2)

Publication Number Publication Date
US20010001522A1 US20010001522A1 (en) 2001-05-24
US6270114B2 true US6270114B2 (en) 2001-08-07

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US09/085,814 Expired - Fee Related US6270114B2 (en) 1997-05-27 1998-05-27 Method and arrangement for seat occupancy recognition in a motor vehicle

Country Status (3)

Country Link
US (1) US6270114B2 (de)
EP (1) EP0881132B1 (de)
DE (2) DE19722085A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6598900B2 (en) 1999-04-19 2003-07-29 Automotive Systems Laboratory, Inc. Occupant detection system
US6703845B2 (en) 2000-05-26 2004-03-09 Automotive Systems Laboratory, Inc. Occupant sensor
US20060238205A1 (en) * 2005-04-22 2006-10-26 Cypress Semiconductor Corporation Directional capacitive sensor system and method
US20070080657A1 (en) * 2005-10-08 2007-04-12 Rainer Gerding Vehicle seat arrangement with an electric adjustment mechanism
US7721609B2 (en) 2006-03-31 2010-05-25 Cypress Semiconductor Corporation Method and apparatus for sensing the force with which a button is pressed
US9266454B2 (en) 2013-05-15 2016-02-23 Gentherm Canada Ltd Conductive heater having sensing capabilities
US9701232B2 (en) 2013-10-11 2017-07-11 Gentherm Gmbh Occupancy sensing with heating devices
US9815488B2 (en) 2014-05-13 2017-11-14 Gentherm Gmbh Temperature control device for a steering device

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WO1999054172A1 (en) * 1998-04-20 1999-10-28 Siemens Automotive Corporation A detection system for determining the proximity of an object relative to an airbag
DE10017933C2 (de) * 2000-04-11 2002-10-31 Siemens Ag Messanordnung
DE60125353T2 (de) * 2000-06-06 2007-06-21 Automotive Systems Laboratory Inc., Farmington Hills Sitzbelegungserkennungssystem
DE10057222B4 (de) * 2000-11-18 2007-02-08 I.G. Bauerhin Gmbh Flächenheizelement
LU90830B1 (en) * 2001-09-11 2003-03-12 Iee Sarl Method for the classification of an occupancy status of a vehicle seat
DE10145626B4 (de) 2001-09-15 2011-01-13 Daimler Ag Identifikationsvorrichtung für einen Kindersitz
US7317699B2 (en) 2001-10-26 2008-01-08 Research In Motion Limited System and method for controlling configuration settings for mobile communication devices and services
DE10231363A1 (de) * 2002-07-11 2004-01-22 Robert Bosch Gmbh Schutzeinrichtung für ein Fahrzeug
DE102005004190B4 (de) * 2005-01-29 2016-02-04 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Verfahren zur Aktivierung und Auslösung eines Insassenschutzsystems für Kraftfahrzeuge, sowie Vorrichtung hierfür
US20110186560A1 (en) * 2008-09-23 2011-08-04 Lear Corporation Ventilated seat assembly and a method of control
US8829954B2 (en) 2011-03-23 2014-09-09 Qualcomm Incorporated Frequency divider circuit
DE102011077486B3 (de) * 2011-06-14 2012-10-18 Robert Bosch Gmbh Vorrichtung und Verfahren zur Auslösung eines Insassenschutzmittels, Auslösesystem und Fahrzeug
EP3099531B2 (de) 2014-01-30 2026-03-25 Warren Industries Ltd. Fahrzeugtürsteuerungssystem mit dynamischer hinderniserkennung
US10329763B2 (en) * 2016-02-24 2019-06-25 Wabash National, L.P. Composite floor structure and method of making the same
US12049232B2 (en) * 2022-08-29 2024-07-30 GM Global Technology Operations LLC System and method for determining a sampling rate of occupancy data for an automotive vehicle

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DE443301C (de) 1925-11-01 1927-04-21 Heinrich Kuechenmeister Verfahren zum Herstellen von Lautschrifttraegern
DE3802159A1 (de) 1988-01-26 1989-08-03 Porsche Ag Schalteinrichtung
DE4112579A1 (de) 1990-04-18 1991-10-24 Nissan Motor Innensystem fuer kraftfahrzeuge
DE4110702A1 (de) 1991-04-03 1992-10-08 Bosch Gmbh Robert Fahrzeugsitz
US5322323A (en) 1991-12-20 1994-06-21 Toyota Jidosha Kabushiki Kaisha Collision sensing system for side air bag system
US5330226A (en) 1992-12-04 1994-07-19 Trw Vehicle Safety Systems Inc. Method and apparatus for detecting an out of position occupant
DE4338285A1 (de) 1993-11-10 1995-05-11 Bosch Gmbh Robert Elektronisches Gerät für die Ansteuerung einer Sitzheizung
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GB2289332A (en) 1994-05-09 1995-11-15 Automotive Tech Int Passenger identification and monitoring
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US6012006A (en) * 1995-12-07 2000-01-04 Kansei Corporation Crew member detecting device

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DE4433601C1 (de) * 1994-09-21 1996-04-04 Kurt Bruse Verfahren und Vorrichtung zur Aktivierung bzw. Deaktivierung von sicherheitsrelevanten Systemen innerhalb der Fahrgastzelle eines Kraftfahrzeugs

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE443301C (de) 1925-11-01 1927-04-21 Heinrich Kuechenmeister Verfahren zum Herstellen von Lautschrifttraegern
DE3802159A1 (de) 1988-01-26 1989-08-03 Porsche Ag Schalteinrichtung
DE4112579A1 (de) 1990-04-18 1991-10-24 Nissan Motor Innensystem fuer kraftfahrzeuge
DE4110702A1 (de) 1991-04-03 1992-10-08 Bosch Gmbh Robert Fahrzeugsitz
WO1992017344A1 (de) 1991-04-03 1992-10-15 Robert Bosch Gmbh Fahrzeugsitz
US5322323A (en) 1991-12-20 1994-06-21 Toyota Jidosha Kabushiki Kaisha Collision sensing system for side air bag system
US5330226A (en) 1992-12-04 1994-07-19 Trw Vehicle Safety Systems Inc. Method and apparatus for detecting an out of position occupant
DE4338285A1 (de) 1993-11-10 1995-05-11 Bosch Gmbh Robert Elektronisches Gerät für die Ansteuerung einer Sitzheizung
US5602425A (en) 1993-11-16 1997-02-11 Mercedes-Benz Ag Motor vehicle seat-occupancy-detection device
DE4441184A1 (de) 1993-11-19 1995-06-14 Autoliv Dev Fahrzeugsicherheitssystem
US5689421A (en) 1993-11-19 1997-11-18 Goernig; Thomas Vehicle safety system
US5515933A (en) 1994-03-23 1996-05-14 Mercedes-Benz Ag Device for recognizing a child's seat which is strapped to the front passenger's seat of a motor vehicle
GB2289332A (en) 1994-05-09 1995-11-15 Automotive Tech Int Passenger identification and monitoring
DE4424878A1 (de) 1994-07-14 1996-01-18 Temic Bayern Chem Airbag Gmbh Airbag-Sicherheitssystem für ein Kraftfahrzeug
US5770997A (en) * 1995-06-26 1998-06-23 Alliedsignal Inc. Vehicle occupant sensing system
US6012006A (en) * 1995-12-07 2000-01-04 Kansei Corporation Crew member detecting device
DE19724496A1 (de) 1996-06-11 1997-12-18 Toyota Motor Co Ltd Hinderniserfassungsvorrichtung und diese verwendende Insassensicherheitsvorrichtung
US5783871A (en) * 1996-09-24 1998-07-21 Trw Inc. Apparatus and method for sensing a rearward facing child seat

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6598900B2 (en) 1999-04-19 2003-07-29 Automotive Systems Laboratory, Inc. Occupant detection system
US6703845B2 (en) 2000-05-26 2004-03-09 Automotive Systems Laboratory, Inc. Occupant sensor
US7098674B2 (en) 2000-05-26 2006-08-29 Automotive Systems Laboratory, Inc. Occupant sensor
US20060238205A1 (en) * 2005-04-22 2006-10-26 Cypress Semiconductor Corporation Directional capacitive sensor system and method
US20070080657A1 (en) * 2005-10-08 2007-04-12 Rainer Gerding Vehicle seat arrangement with an electric adjustment mechanism
US7479749B2 (en) * 2005-10-08 2009-01-20 Faurecia Autositze Gmbh Vehicle seat arrangement with an electric adjustment mechanism
US7721609B2 (en) 2006-03-31 2010-05-25 Cypress Semiconductor Corporation Method and apparatus for sensing the force with which a button is pressed
US9266454B2 (en) 2013-05-15 2016-02-23 Gentherm Canada Ltd Conductive heater having sensing capabilities
US10075999B2 (en) 2013-05-15 2018-09-11 Gentherm Gmbh Conductive heater having sensing capabilities
US9701232B2 (en) 2013-10-11 2017-07-11 Gentherm Gmbh Occupancy sensing with heating devices
US10076982B2 (en) 2013-10-11 2018-09-18 Gentherm Gmbh Occupancy sensing with heating devices
US9815488B2 (en) 2014-05-13 2017-11-14 Gentherm Gmbh Temperature control device for a steering device
US10196079B2 (en) 2014-05-13 2019-02-05 Gentherm Gmbh Temperature control device for a steering device

Also Published As

Publication number Publication date
EP0881132A1 (de) 1998-12-02
DE19722085A1 (de) 1998-12-03
DE59813308D1 (de) 2006-02-02
EP0881132B1 (de) 2005-12-28
US20010001522A1 (en) 2001-05-24

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